QUANTITATIVE ASSESSMENT OF ANISOCOTYLY IN HABERLEA RHODOPENSIS AND RAMONDA MYCONI

2019 ◽  
Vol 76 (3) ◽  
pp. 377-391
Author(s):  
B.-H. Huang ◽  
K. Nishii ◽  
C.-N. Wang ◽  
M. Möller

Anisocotyly, the unequal development of cotyledons post germination, is a unique trait observed only in Old World Gesneriaceae (Lamiales). New World Gesneriaceae have isocotylous seedlings. In both Old and New World Gesneriaceae, cotyledons initially grow equally for a short period just after germination. In the New World species, both cotyledons cease their growth at the same time early on, whereas in Old World species one cotyledon continues to expand to become a macrocotyledon while the other withers away. In this study, cotyledon growth was observed in two European Old World Gesneriaceae: Haberlea rhodopensis and Ramonda myconi. The results were compared with those for the typical anisocotylous species Streptocarpus rexii and the typical isocotylous species Corytoplectus speciosus. We found that the cotyledon growth patterns in Haberlea rhodopensis and Ramonda myconi were intermediate between the typical anisocotylous or isocotylous species. Haberlea rhodopensis and Ramonda myconi showed irregular growth patterns, with some plants being slightly anisocotylous but most being isocotylous. The developmental basis for the residual anisocotyly, the extended basal meristem activity in the macrocotyledon, appeared to be identical in the European species to that in the typical Old World Streptocarpus rexii but weakly expressed, rare and terminated early. In conclusion, European Gesneriaceae retain a reduced anisocotylous growth that may be linked to their early plumule development.

1967 ◽  
Vol 45 (5) ◽  
pp. 725-735 ◽  
Author(s):  
Cecily Madahar

Old World species of Anemone L. (section Eriocephalus Hook. f. & Thoms.) with tuberous rootstocks have been classified into three groups on the basis of their distribution and karyotypes. Anemone coronaria L., A. pavonina Lam., and A. hortensis L. of the northern, central, and eastern Mediterranean regions have karyotypes characteristic of the genus: three acrocentric, one submetacentric, and four metacentric chromosomes. Chromosomes of A. coronaria are smaller than those of A. pavonina and A. hortensis. Anemone palmata L. from the western Mediterranean differs from these in having four acrocentric and four metacentric chromosomes. Karyotypes of taxa from central Asia received as A. "bucharica", A. "petiolulosa", and A. "biflora" have three acrocentrics, two submetacentrics, and only three metacentrics. All taxa are diploid, 2n = 16, except A. palmata in which tetraploid populations are also known.Crosses between Old and New World species of Anemone with tuberous rootstocks were failures while those between Old World species with tuberous rootstocks and New World species with fibrous or woody rootstocks met with limited success.


1998 ◽  
Vol 130 (4) ◽  
pp. 491-507 ◽  
Author(s):  
K.G.A. Hamilton

AbstractChlorita nearctica is described from the Yukon Territory and is the first member of its genus found in the New World. A synopsis is presented to the Old World species of Chlorita Fieber, 1866 (Typhlocybinae, tribe Empoascini). A new typhlocybine tribe Forcipatini is created for Forcipata DeLong & Caldwell, 1936 and Notus Fieber, 1866. A synopsis of the genus Notus is presented, with Curta as a subgenus containing only the type species. Notus isolatus sp.nov. is described from Drummond Island, Michigan, in Lake Huron and from Quebec. A synopsis of the genus Forcipata DeLong & Caldwell is presented; all species belong to a single subgenus. Five new species are described: F. forficula from Florida, F. ips from Alaska and Yukon, F. montana from the mountains of British Columbia and Montana, and F. unica and F. xlix from Wisconsin. The New World species of the forcipatine genera are keyed.


Zootaxa ◽  
2009 ◽  
Vol 2230 (1) ◽  
pp. 57-63 ◽  
Author(s):  
LAURENCE A. MOUND ◽  
DAVID A. NICKLE

A key is provided to five Old World species that comprise the genus Ceratothripoides Bagnall, and the species C. revelatus (Priesner) is recalled from synonymy with C. brunneus Bagnall. Five New World species previously placed in this genus are here allocated to Retanathrips Mound & Nickle gen.n., with Physothrips funestus Hood as type species.


Zootaxa ◽  
2012 ◽  
Vol 3370 (1) ◽  
pp. 1
Author(s):  
OWEN LONSDALE ◽  
STEPHEN A. MARSHALL

Sobarocephala Czerny is divided into nine newly erected species groups: the S. archisobarocephala (4 spp.), S. erwini (3spp.), S. flava (8 New World spp.; 2 Old World spp.), S. flaviseta (86 New World spp.; 1 Old World sp.), S. interrupta (86spp.), S. isla (25 spp.), S. latipennis (16 spp.), S. plumicornis (9 Old World spp.), and S. ruebsaameni (11 spp.) groups; 1species (S. setulocetra spec. nov.) remains unplaced. There are 240 species of Sobarocephala in the New World, including17 Nearctic (2 extend into the Neotropical Region) and 170 new species, some of which were previously considered va-rieties of S. humeralis Melander & Argo. The Neotropical fauna is here described, illustrated, keyed, and placed in a phy-logenetic context. Sobarocephala peruana Soós stat. nov., formerly a subspecies of S. nigronota Melander & Argo, israised to the species level, S. imitans Curran syn. nov. and S. diversipes Curran syn. nov. are synonymized with S. liturataMelander & Argo, S. annulata albiventris Soós syn. nov. is synonymized with S. annulata Melander & Argo, S. albitarsisCzerny syn. nov. is synonymized with S. humeralis, and S. pruinosa pallidor Steyskal syn. n. is synonymized with S. pru-inosa Soós. Lectotypes are designated for S. bistrigata (Kertesz) , S. lumbalis Williston, S. plumicornis Lamb and S. variegata Melander & Argo. The egg of S. uberis spec. nov. is described.


2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Neil Berry ◽  
Deborah Ferguson ◽  
Claire Ham ◽  
Jo Hall ◽  
Adrian Jenkins ◽  
...  

Abstract South American Zika virus (ZIKV) recently emerged as a novel human pathogen, linked with neurological disorders. However, comparative ZIKV infectivity studies in New World primates are lacking. Two members of the Callitrichidae family, common marmosets (Callithrix jacchus) and red-bellied tamarins (Saguinus labiatus), were highly susceptible to sub-cutaneous challenge with the Puerto Rico-origin ZIKVPRVABC59 strain. Both exhibited rapid, high, acute viraemia with early neuroinvasion (3 days) in peripheral and central nervous tissue. ZIKV RNA levels in blood and tissues were significantly higher in New World hosts compared to Old World species (Macaca mulatta, Macaca fascicularis). Tamarins and rhesus macaques exhibited loss of zonal occludens-1 (ZO-1) staining, indicative of a compromised blood-brain barrier 3 days post-ZIKV exposure. Early, widespread dissemination across multiple anatomical sites distant to the inoculation site preceded extensive ZIKV persistence after 100 days in New and Old World lineages, especially lymphoid, neurological and reproductive sites. Prolonged persistence in brain tissue has implications for otherwise resolved human ZIKV infection. High susceptibility of distinct New World species underscores possible establishment of ZIKV sylvatic cycles in primates indigenous to ZIKV endemic regions. Tamarins and marmosets represent viable New World models for ZIKV pathogenesis and therapeutic intervention studies, including vaccines, with contemporary strains.


1972 ◽  
Vol 30 (1) ◽  
pp. 191-195 ◽  
Author(s):  
Thomas B. Downer ◽  
William D. Thompson

The law of initial values was tested in the serial responses of monkeys to an auditory stimulus. The “law” was not confirmed for heart rates. GSRs were absent in the new world monkeys but supported the law of initial values for half of the Ss of old world species. Less support was found when conductance scores were used.


Zootaxa ◽  
2007 ◽  
Vol 1601 (1) ◽  
pp. 1-127 ◽  
Author(s):  
ANTHONY RAW

Megachile is treated here as a single genus combining Megachile with Chalicodoma. In the Americas the genus occurs from Alaska and Canada to southern Chile and Argentina, and is well represented in the tropics. Despite their economic and ecological importance as pollinators, the biology of few species has been studied in detail largely because they are difficult to identify. The 419 species in the catalogue are allocated to 28 subgenera (including 10 Old World species introduced to the region and one species dubiously recorded from the New World). Summaries of information on each species’ classification, biology and geographical distribution are given.


Zootaxa ◽  
2018 ◽  
Vol 4441 (3) ◽  
pp. 511 ◽  
Author(s):  
CHARLES R. BARTLETT ◽  
ASHLEY C. KENNEDY

The New World species attributed to the genus Malaxa Melichar (Hemiptera: Fulgoroidea: Delphacidae) are reviewed with special reference to the type species Malaxa acutipennis from the Philippines. We provide an amended diagnosis for Malaxa acutipennis contrasted with the genus delineation presented for Chinese Malaxa, most recently by Hou et al. (2013). We find Malaxa to be an Old World genus and segregate New World species into two new genera, Lamaxa and Xalama, diagnosed most readily by proportions of the antennae and features of the terminalia. Both Lamaxa and Xalama are uncommonly encountered. Lamaxa is distributed widely through the Neotropics, whereas Xalama is heretofore known only from Bolivia and Peru. 


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